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6 Μαρ 2011 · I am a beginner in MATLAB, and I need to represent e (-t 2). I know that, for example, to represent e x I use exp(x), and I have tried the following. 1) tp=t^2; / tp=t*t; x=exp(-tp); 2) x=exp(-t^2); 3) x=exp(-(t*t)); 4) x=exp(-t)*exp(-t); What is the correct way to do it?
21 Νοε 2020 · I have the task to plot a graph using the function y=e^(-t) but I am having trouble with the variable t. Do I have to define e or t first? or is there another way to rewrite this equation?
14 Οκτ 2004 · The lens mounting threads were to inch measurements, and fitted standard graphics lens mounts, i.e., 5"-20, etc. Threading was easy on a standard lathe gearbox, I fitted a 7" f/2.5 Aero-Ektar to an Exakta 6x6, for astro-photography.
THE ITEM: Lensmount for 7"Kodak Aero Ektar f2.5 lens on Speed Graphics. PROSPECTIVE USERS: Owners of Pacemaker Speed Graphic 45 and earlier model 4x5 Speed Graphic Cameras. PRICE:
Kodak Aero-Ektar f2.5 7in (178mm) 5x5 EE ****, Made in USA by Eastman Kodak Co., Rochester, N.Y. According the prescription USP 2,343,627 (Aklin/Kodak) it is a seven element Biotar type.
Hard to find Kodak AERO-EKTAR 178mm f/2.5 lens, custom mounted in Ilex No. 5 Universal Shutter. Lens and shutter just back from CLA. Serial # EA2643. Shutter works smoothly. Glass in nice shape. Shutter Speeds 1, 1/2, 1/5, 1/10, 1/25, 1/50 plus B & T. Apertures f/2.5 to 16. With lens mounting ring.
21 Μαρ 2021 · Taking aerial surveillance photographs on large format roll film for nighttime reconnaissance missions was precisely what it was designed for. This Aero-Ektar is of the 7" variety (or 178mm in metric) which makes it a 48mm lens on 35mm format cameras, give or take. What's far more astounding though, is the maximum aperture achievable. ⨍/2.5.
